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Finding the Fourth Proportional to 18,944.70, 28,410.90 and 8,947.90

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Solution

The fourth proportional to 18,944.70, 28,410.90 and 8,947.90 is: 13,418.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,944.70 : 28,410.90 = 8,947.90 : x
  2. Step 2: Convert to fraction form
    18,944.70/28,410.90 = 8,947.90/x
  3. Step 3: Cross multiply
    18,944.70x = 28,410.90 × 8,947.90
  4. Step 4: Simplify right side
    18,944.70x = 254,217,944.40
  5. Step 5: Solve for x
    x = 254,217,944.40/18,944.70
  6. Step 6: Final answer
    x = 13,418.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.